单掺和双掺不同长径比钢纤维对全轻混凝土力学性能的影响  

Effect of Single and Double Doped Steel Fiber with Different Length-Diameter Ratio on Mechanical Properties of All-Lightweight Concrete

作　　者：牟宗宾 武沁源 王秀丽[2] MOU Zongbin;WU Qinyuan;WANG Xiuli(Jilin Xin′an Property Service Co.,Ltd.,Changchun Jilin 130000,China;School of Civil Engineering,Jilin Jianzhu University,Changchun Jilin 130119,China)

机构地区：[1]吉林省信安物业服务有限公司,吉林长春130000 [2]吉林建筑大学土木工程学院,吉林长春130119

出　　处：《北方建筑》2024年第2期22-26,共5页Northern Architecture

基　　金：吉林省科技厅重点研发项目(20210203145SF)。

摘　　要：为研究单掺和双掺不同长径比钢纤维对免烧结粉煤灰陶粒全轻混凝土力学性能影响,选用体积掺量为1%的剪切钢纤维作为增强材料,以钢纤维长径比(18.75,25和31.25)和掺入方式(单掺、双掺)为试验参数,对LC30全轻混凝土进行立方体抗压强度、轴心抗压强度、抗折强度、劈裂抗拉强度和弹性模量试验。试验结果表明:钢纤维能明显改善全轻混凝土的力学性能;不同的长径比和掺入方式对全轻混凝土的抗折度和劈裂抗拉强度影响较大,对立方体抗压强度和轴心抗压强度影响较小,对弹性模量几乎没有影响。In order to study the effect of single and double doped steel fiber with different length-diameter ratios on mechanical properties of non-sintered pulverized coal ash ceramic all-lightweight concrete,shear steel fiber with volume content of 1%was selected as the reinforcement material,and the length-diameter ratio of steel fiber(18.75,25 and 31.25)and the mixing method(single and double doped)were used as the test parameters,the cubic compressive strength,axial compressive strength,flexural strength,splitting tensile strength and elastic modulus of LC30 all-lightweight concrete were tested.The test results show that steel fiber can obviously improve the mechanical properties of all-lightweight concrete;different length-diameter ratios and mixing methods have great influence on flexural strength and splitting tensile strength of all-lightweight concrete,but little influence on cube compressive strength and axial compressive strength,and almost no influence on elastic modulus.

关 键 词：免烧结粉煤灰陶粒 全轻混凝土 剪切波形钢纤维 长径比 力学性能 

分 类 号：TU528.2[建筑科学—建筑技术科学]